Metabolites are produced during metabolism by breaking down of food, drugs, chemicals and tissues in the body. 

CAS Number
Captopril STD- 51781-06-7: IMP-F- 63250-36-2
Alternate CAS Number
Captopril STD- 51781-21-6(HCl Salt)
CAS Number
93413-90-2
Alternate CAS Number
149289-30-5(Freebase)